METHOD FOR PREPARING AMMOXIDATION CATALYSTS FOR A FLUIDISED-BED OR MOVING-BED REACTOR

摘要

A method for preparing catalysts including mixed oxides based on vanadium, antimony and optionally tin and/or titanium and/or iron and/or other metals, and deposited on a carrier, as well as the use thereof for the ammoxidation of alkanes, are disclosed. Said method includes impregnating a solid oxide carrier with a solution of respective vanadium, antimony or optionally tin and/or titanium and/or iron and/or other metal compounds in at least one saturated alcohol, contacting the resulting impregnated solid carrier with an aqueous buffer solution having a pH of 6 to 8, separating and drying the solid, and calcining the solid in two stages, firstly at 300-350 DEG C, and then at 400-800 DEG C. Such catalysts are suitable for use in a fluidised or moving bed.